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Quality / Martin: no quantity, no numbers, no qual. properties, pointless, to indicate space time points without qual. properties - hence physics / mathematics: quantity: "system of relations" - Armstrong: maybe physics is a very small area: at the end we will only have formulas.
AR II = Disp
D. M. Armstrong
Dispositions, Tim Crane, London New York 1996
What is a Law of Nature? Cambridge 1983